=============================
[ BUG: Invalid wait context ]
6.13.0-rc4-syzkaller-00078-g059dd502b263 #0 Not tainted
-----------------------------
syz-executor/5923 is trying to lock:
ffff88806a63af60 (batched_entropy_u8.lock){-.-.}-{3:3}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
ffff88806a63af60 (batched_entropy_u8.lock){-.-.}-{3:3}, at: get_random_u8+0xef/0x7f0 drivers/char/random.c:551
other info that might help us debug this:
context-{2:2}
2 locks held by syz-executor/5923:
#0: ffff8880323e0e80 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182
#1: ffff88806a63ebd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:598
stack backtrace:
CPU: 0 UID: 0 PID: 5923 Comm: syz-executor Not tainted 6.13.0-rc4-syzkaller-00078-g059dd502b263 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_lock_invalid_wait_context kernel/locking/lockdep.c:4826 [inline]
check_wait_context kernel/locking/lockdep.c:4898 [inline]
__lock_acquire+0x878/0x3c40 kernel/locking/lockdep.c:5176
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849
local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
get_random_u8+0x107/0x7f0 drivers/char/random.c:551
get_random_u32_below include/linux/random.h:78 [inline]
kfence_guarded_alloc mm/kfence/core.c:421 [inline]
__kfence_alloc+0x4e8/0x15f0 mm/kfence/core.c:1136
kfence_alloc include/linux/kfence.h:129 [inline]
slab_alloc_node mm/slub.c:4152 [inline]
__kmalloc_cache_noprof+0x129/0x410 mm/slub.c:4324
kmalloc_noprof include/linux/slab.h:901 [inline]
add_stack_record_to_list mm/page_owner.c:172 [inline]
inc_stack_record_count mm/page_owner.c:214 [inline]
__set_page_owner+0x34d/0x560 mm/page_owner.c:329
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1558
prep_new_page mm/page_alloc.c:1566 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3476
__alloc_pages_noprof+0x223/0x25b0 mm/page_alloc.c:4753
alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2269
stack_depot_save_flags+0x8aa/0x9c0 lib/stackdepot.c:627
kasan_save_stack+0x42/0x60 mm/kasan/common.c:48
__kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:544
task_work_add+0xc0/0x3b0 kernel/task_work.c:77
task_tick_numa kernel/sched/fair.c:3616 [inline]
task_tick_fair+0x524/0x8e0 kernel/sched/fair.c:13101
sched_tick+0x1dd/0x4f0 kernel/sched/core.c:5652
update_process_times+0x19c/0x2d0 kernel/time/timer.c:2524
tick_sched_handle kernel/time/tick-sched.c:276 [inline]
tick_nohz_handler+0x376/0x530 kernel/time/tick-sched.c:297
__run_hrtimer kernel/time/hrtimer.c:1739 [inline]
__hrtimer_run_queues+0x5fb/0xae0 kernel/time/hrtimer.c:1803
hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:check_kcov_mode kernel/kcov.c:185 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x3b/0x70 kernel/kcov.c:217
Code: 69 7e a9 00 01 ff 00 48 8b 34 24 74 1d f6 c4 01 74 43 a9 00 00 0f 00 75 3c a9 00 00 f0 00 75 35 8b 82 1c 16 00 00 85 c0 74 2b <8b> 82 f8 15 00 00 83 f8 02 75 20 48 8b 8a 00 16 00 00 8b 92 fc 15
RSP: 0018:ffffc90003347828 EFLAGS: 00000246
RAX: 0000000080000000 RBX: ffff888023514129 RCX: ffffffff8b26b999
RDX: ffff88802a81c880 RSI: ffffffff8b26b906 RDI: 0000000000000001
RBP: ffff8880350b7031 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000043 R11: 0000000000000000 R12: 0000000000000043
R13: ffff888023515000 R14: ffff8880350b702d R15: 0000000000000003
string_nocheck lib/vsprintf.c:650 [inline]
string+0x146/0x3d0 lib/vsprintf.c:728
vsnprintf+0xbed/0x1880 lib/vsprintf.c:2848
seq_vprintf fs/seq_file.c:391 [inline]
seq_printf+0x1a6/0x250 fs/seq_file.c:406
s_show+0x288/0x320 kernel/kallsyms.c:751
seq_read_iter+0xb19/0x12b0 fs/seq_file.c:272
seq_read+0x39f/0x4e0 fs/seq_file.c:162
pde_read fs/proc/inode.c:308 [inline]
proc_reg_read+0x23d/0x330 fs/proc/inode.c:320
vfs_read+0x1df/0xbe0 fs/read_write.c:563
ksys_read+0x12b/0x250 fs/read_write.c:708
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7effd25846fd
Code: a8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb b5 e8 a8 48 00 00 0f 1f 84 00 00 00 00 00 80 3d 41 7e 1c 00 00 74 17 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 5b c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec
RSP: 002b:00007fffae515068 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000555570183e40 RCX: 00007effd25846fd
RDX: 0000000000001000 RSI: 00007effcf7d66b9 RDI: 0000000000000008
RBP: 00007fffae515170 R08: 00000000006ea000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 0000555570182c40 R14: 00007fffae515170 R15: 00007fffae515150
----------------
Code disassembly (best guess):
0: 69 7e a9 00 01 ff 00 imul $0xff0100,-0x57(%rsi),%edi
7: 48 8b 34 24 mov (%rsp),%rsi
b: 74 1d je 0x2a
d: f6 c4 01 test $0x1,%ah
10: 74 43 je 0x55
12: a9 00 00 0f 00 test $0xf0000,%eax
17: 75 3c jne 0x55
19: a9 00 00 f0 00 test $0xf00000,%eax
1e: 75 35 jne 0x55
20: 8b 82 1c 16 00 00 mov 0x161c(%rdx),%eax
26: 85 c0 test %eax,%eax
28: 74 2b je 0x55
* 2a: 8b 82 f8 15 00 00 mov 0x15f8(%rdx),%eax <-- trapping instruction
30: 83 f8 02 cmp $0x2,%eax
33: 75 20 jne 0x55
35: 48 8b 8a 00 16 00 00 mov 0x1600(%rdx),%rcx
3c: 8b .byte 0x8b
3d: 92 xchg %eax,%edx
3e: fc cld
3f: 15 .byte 0x15